OUTR receives a character from AC andĭelivers it to an output device. This is because INPR receives a character from an inputĭevice which is then transferred to AC. The input register INPR and the output register OUTR have 8 bits eachĪnd communicate with the eight least significant bits in the bus.Ĭonnected to provide information to the bus but OUTR can only receive information Only the 12 least significant bits are transferred into the register. When AR or PC receive information from the bus, When theĬontents of AR or PC are applied to the 16-bit common bus, the four most Two registers, ARĪnd PC, have 12 bits each since they hold a memory address. The memory places its 16-bit output onto theīus when the read input is activated and S 2S 1S 0 = 111.įour registers, DR, AC, IR, and TR, have 16 bits each. The memory receives the contents of the bus Register whose LD (load) input is enabled receives the data from the bus during Inputs of each register and the data inputs of the memory. The lines from the common bus are connected to the Outputs of DR are placed on the bus lines when S 2S 1S 0 = 011 since this is the For example, the number along the output of DR is 3. Number along each output shows the decimal equivalent of the required binary The specific output that is selected for the bus lines at any given time isĭetermined from the binary value of the selection variables S 2, S 1, and S 0. The outputs of seven registers and memory are connected to the common The basic computer to a common bus system is shown in Fig. The connection of the registers and memory of Transferring information in a system with many registers is to use a common Register and the inputs of the other registers. Wires will be excessive if connections are made between the outputs of each One register to another and between memory and registers. Paths must be provided to transfer information from The basic computer has eight registers, a memory unit, and a control unit.
0 Comments
Leave a Reply. |